Final answer:
The characteristic of an EMR system that must be accessible to any specialists who are also treating the patient is correct, as EMRs are designed to share patient data securely among healthcare providers while maintaining privacy.
Step-by-step explanation:
The characteristic of an Electronic Medical Records (EMR) system used by a medical office that is correct among the provided options is D. It must be accessible to any specialists who are also treating the patient. EMRs are the principal medical record used in healthcare facilities and they have been increasingly utilized to improve the quality of healthcare. Despite often being complex systems that may incorporate components from various vendors, one of their primary functions is to share patient data securely among different healthcare providers, which is essential for coordinated care. This sharing can indeed reduce healthcare costs and improve healthcare quality. However, maintaining the privacy of electronic data is also a critical aspect of EMR systems, ensuring compliance with regulations like the Health Insurance Portability and Accountability Act (HIPAA).